United Flight 3129 Deals & Information (2025/2026)

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United Flight 3129 Route Deals From $95

The cheapest prices found with in the last 7 days for return flights were $147 and $95 for one-way flights to Luis Munoz Marin Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Jun 12 - Fri, Jun 27
STT
Cyril E. King
SJU
Luis Munoz Marin Intl.
$147 Roundtrip, found 1 hour ago
$147
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Jun 12 from Cyril E. King to Luis Munoz Marin Intl., returning Fri, Jun 27, priced at $147 found 1 hour ago
Thu, Jun 12 - Fri, Jun 27
STT
Cyril E. King
SJU
Luis Munoz Marin Intl.
$1,217 Roundtrip, found 1 hour ago
$1,217
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Jun 12 from Cyril E. King to Luis Munoz Marin Intl., returning Fri, Jun 27, priced at $1,217 found 1 hour ago